#include <bits/stdc++.h>
using namespace std;
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
 
    int n;
    if (!(cin >> n)) return 0;
 
    vector<long long> a(n);
    for (int i = 0; i < n; ++i) cin >> a[i];
 
    long long s = 0, ans = 0;
    for (int i = 0; i < n; ++i) {
        long long b; 
        cin >> b;
        s += a[i] - b;              // s_i
        ans = max(ans, llabs(s));   // i = 1..n-1; s_n = 0 nên không ảnh hưởng
    }
    cout << ans << '\n';
    return 0;
}
 

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

NAozIDEwIDggMgo0IDYgMTAgMwo=

4
3 10 8 2
4 6 10 3